VOGT ICE TUBE-ICE P-24A, Service Manual

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P24A & P34A Service Manual
INSTALLING YOUR TUBE-ICE MACHINE
12/20/12
3-12
P24A Condenser Water P34A Condenser Water
Entering
Water
Flow
GPM
Cond.
PSID
Entering
Water
Flow
GPM
Cond.
PSID
85 ° F
196 14
85 ° F
371 12
80 ° F
131 6
80 ° F
241 5
75 ° F
98 3
75 ° F
185 3
70 ° F
79 2
70 ° F
148 2
65 ° F
66 2
65 ° F
124 1
60 ° F
56 1
60 ° F
106 1
55 ° F
49 1
55 ° F
93 1
50 ° F
44 1
50 ° F
82 1
Total Heat Rejection
THR = 981,300 BTUH
Total Heat Rejection
THR = 1,852,500 BTUH
Condenser water flow is based on pulldown of 30 ° F SST and 105 ° F SDT. Condenser water
pressure drop does not include water regulating valve. Consult factory for sizing if desired.
TABLE 3-2
Condenser Water Requirements
The following table show the model of Marley cooling tower required for operating at various wet
bulbs to cool 91
° F (33 ° C) entering water to 85 ° F (29.4 ° C) exiting water.
Model GPM
Cond. PD
PSIG
75
° ° ° °
F 76
° ° ° °
F 77
° ° ° °
F 78
° ° ° °
F 79
° ° ° °
F 80
° ° ° °
F
P24A 195 14 494G 494G 494G 494G 494G 494G
P34A 375/400* 13 496K 496K 496K 496K (2) 495K (2) 496K
* Note: P34A with a condenser containing carbon steel tubes, require 375gpm water flow. P34A with a
condenser containing stainless steel tubes, require 400gpm water flow.
TABLE 3-3
Marley Cooling Tower Recommendations
Tower nozzles will be selected based on GPM required for condenser.
The condenser water pump should be sized on GPM required for condenser at 80 ft. total discharge
head for a typical installation. However, due to cooling tower location and pressure drop through
water lines, the water pump should be sized for each installation.
The ice machine is supplied with a fan control switch for cycling the cooling tower fan on and off,
thereby maintaining the proper operating head pressure. If the condenser inlet water temperature is
expected to be below 75
° F/24 ° C, a water regulating valve should be installed in the condenser water
inlet line and adjusted to maintain a head pressure of not less than 175 psig.
See FIGURES 3-5 through 3-8 for possible cold climate installations with indoor sump.
Safety Valves.
Four safety pressure relief valves are an integral part of the packaged Tube-Ice

machine. Two are located in the low side of the system on the freezer, and two are in the high side
of the system on the receiver. Vent each of the pressure relief valves to the atmosphere in such a
manner as to comply with local and national codes. Refer to the International Institute of Ammonia
Refrigeration (IIAR) standard for specific requirements and instructions.